<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script th:src="@{|/js/jquery-1.11.3.min.js|}"></script>
    <script th:src="@{|/js/jQuery.md5.js|}"></script>
    <script>
        $(function(){
            $("#loginBut").bind("click",function(){
                var v_md5password=$.md5($("#password").val());
                alert(v_md5password)
                $("#md5Password").val(v_md5password)
            })
        })
    </script>
</head>
<body>
<form action="login" method="post">
    账号<input type="text" name="username"><br>
    密码<input type="text"  id="password"><br>
    <input type="hidden" name="password" id="md5Password">
    <input type="submit" value="登录" id="loginBut">
</form>
<span style="color: red" th:text="${errorMessage}"></span>

</body>
</html>